In both the Sports Bar and Orion the rules are clearly posted on a poster board near the entrance.

Being able to read them does not mean they make any sense.

I am always amazed as to the fact the "purpose" of the rules is a big secret. Nobody ever knows why this or that.

If people knew why and the concern was legitimate then people might more easily accept it. But simply saying effective XXX you must now do this does not foster good will.
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"A Wise Man knows what he does not know!"